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Verena Tiefenbeck, from ETH, presents the great shower smart meter technology that shows you in polar bears how much water and energy you have used. From Task 24 workshop on behaviour change in Luzern, October 15, 2013.
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Showered with feedback – How real-time Showered with feedback – How real-time information can change our daily habits
IEA DSM Task 24 - Closing the Loop - Behavior
Change in DSM: From Theory to Policies and Practice
Verena Tiefenbeck
Bits to Energy Lab, ETH Zurich
iHomeLab (Hochschule Luzern), October 15, 2012
The Bits to Energy Lab is a research initiative of the ETH Zurich, the University of St. Gallenand the University of Bamberg.
� Information Management
(E. Fleisch, ETH Zurich, lead)
� Distributed Systems Group
(F. Mattern, ETH Zurich)
© ETH / HSG
B2E Lab
October 2013
Slide 2
� Operations Management
(E. Fleisch, University St. Gallen)
� Energy Efficient Systems
(T. Staake, University Bamberg)
We combine IT and social science concepts tomotivate households to reduce their energyconsumption.
© ETH / HSG
B2E Lab
October 2013
Slide 3
� Measure / Retrieve
behavioral data
� Data analytics
� Place Interventions
(targeting behavior
or enhancing
automation)
� Measure and
adjust
� Research-based
implementation
� Transfer to
practice in
collaboration with
organizations
Our study was carried out in collaboration with partners from Academia, Industry and Politics.
� Bits to Energy Lab at ETH Zurich (lead)
� Amphiro AG
� ewz (Energiewerke Zürich)
� BFE (Swiss Federal Department of Energy)
© ETH / HSG
B2E Lab
October 2013
Slide 4
� University of Lausanne
Behavioral science insights need to be translated into scaled interventions and products.
� Attitudes, perceptions, habits, subconscious
processes,,
� Social sciences: mechanisms for behavior change
� Promising and cost-effective pilots and prototypes
� Application and large-scale implementation is missing
© ETH / HSG
B2E Lab
October 2013
Slide 5
� Application and large-scale implementation is missing
� Rocky path from concept / prototype to large-scale
deployment
Hot water is 2nd largest contributor to residential energy use, but hardly measured and brought to users‘ attention.
� Powering metering devices is tricky in wet environment
� Energy dimension: low awareness
� Feedback at point of consumption
© ETH / HSG
B2E Lab
October 2013
Slide 6
� Easy to understand
� High user control
� Visible and tangible (water)
Source: DoE Buildings Energy Data Book 2011
Promising results of a pilot study motivated further R&D to move from prototype to mass production.
Pilot study (2011) with promising results:
� Prototype of smart shower meter
� Energy and water consumption: 22% reduction
© ETH / HSG
B2E Lab
October 2013
Slide 7
However:
� Sample size (N=61)
� Sampling bias
� Methodological issues
→ Further research and development, cleaner & larger study
Users can install the smart water meter amphiro a1 in three simple steps.
© ETH / HSG
B2E Lab
October 2013
Slide 8
What the smart water meter measures and displays
Measures
� Flow rate
� Temperature
� Duration (shower, interruptions)
Derived from thatper shower
© ETH / HSG
B2E Lab
October 2013
Slide 9
Derived from that
� Water volume
� Energy consumption
Display (standard)
� Temperature
� Water volume
� Energy efficiency class
� Polar bear animation
Amphiro harvests its
energy from the water flow.
One third of the 697 participating households were randomly assigned into the control group (only temperature displayed).
Con-trol
groupTreat-
© ETH / HSG
B2E Lab
October 2013
Slide 10
group
33%
Treat-mentgroup
67%
Our 2-month study combines shower data with survey information.
csv
csv
csv
csv
csv
csv
csv
csv
csv
csv
csv
46,835 showers in 636 households
697 initial surveys,coded
629 complete
© ETH / HSG
B2E Lab
October 2013
Slide 11
629 complete datasets
Survey & smart metering data
(Uni Lausanne)
666 final surveys, coded
What the implementation of the field trial looked like in reality4
© ETH / HSG
B2E Lab
October 2013
Slide 12
Visual data readout
The vast majority of study participants was overall satisfied with the device (83%) and intended to continue using it (79%).
10%
4%
5%
2%
"I / We intend to continue using
the device after the study."
10%
5%
2% 1%
"I'm overall satisfied with the
shower meter."
Agree strongly
Agree
© ETH / HSG
B2E Lab
October 2013
Slide 13
54%
25%
50%
32%
Agree
Neither nor
Disagree
Disagree strongly
Don't know
N=445 (Participants of final
survey excl. control group)
N=665 (Participants of final
survey incl. control group)
Households with the display information reduced their shower consumption by 23%.
� Households with the display decreased their water and
energy consumption by 23% relative to the control group
– Time: -22%
– Breaks: +12%
– Temperature: -0.25°C
– Flow rate: no significant change
© ETH / HSG
B2E Lab
October 2013
Slide 14
– Flow rate: no significant change
� Per-shower reduction
– 10.6 liters
– 360 Wh (η=100%) → 550 Wh (η=65%)
� Effects stable throughout the study (long-term study still
ongoing)
The per-household energy reduction exceeds the impact of electricity smart meters by far (and at a much lower price point).
� Deployment in 5% of Swiss households = equivalent of
electricity production by Swiss wind power in 2012
� ROI much higher than for electricity smart meters
ReductionElectricity smart
meters1
Smart shower
meters
© ETH / HSG
B2E Lab
October 2013
Slide 15
Energy – relative consumption change
3.2% of household electricity
23% of shower energy
Energy – absolute change 86 kWh 443 kWh
Water (liters/yr) / 8500
Cost savings (CHF/yr) 15 96
1source: ewz-Studie Smart Metering,
www.stadt-zuerich.ch/content/dam/stzh/ewz/Deutsch/Netz/Publikationen und Broschueren/Praesentation_ewz_sm.pdf
� Reduction per household per year:
– 23% reduction of energy and water use in the shower
– Water: 8500 liters
– 443 kWh
– CHF 96
Summary of key reduction figures - thank you for listening.
© ETH / HSG
B2E Lab
October 2013
Slide 16
Thank you very much for your attention.
ContactVerena Tiefenbeck │ Bits to Energy Lab │ Chair for Information ManagementDepartment Management, Technology and Economics│ ETH ZurichOffice: + 41 44 632 3953│ Email: [email protected]